Pump



R. C. FORD Aug. 22,` 195o PUMP Filed July 23, 1946 FIG. 2.I

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Patented Aug. 22, 1950 UNITED STATES PATENT OFF 2,519,642 l C E Section 1, Public Law `690, August 8, 1946 Patent expires April 11, 1965 2 |Claims.

I'his invention comprises improvements in com nection with fluid pumps, the object of which 1s to provide a pump of a new or improved type which is distinguished from pumps of the more orthodox kinds in that the need for valves and stuillng boxes and glands is entirely dispensed with, and in that whilst being of an extremely simple and inexpensive construction, is very eilicient and can be run continpously` for long periods of time with little or no attention.

Referring to the drawings- Figure 1 is a side elevation of a pump accordl ing to this invention.

Figure 2 is an end elevation.

Figure 3 is a sectional side view to reveal the interior mechanism, and

Figure 4 is a, sectional end view.

In carrying the present invention into practice as shown upon the accompanying drawings of which a preferred example is shown, the pump comprises astationary rigid hollow cylin-` drical casing 5 having inlet and outlet ports 6, 1, the bore 8 of which is recessed at 9. A hollow cylindrical flexible member I is secured at its ends in a fluid-tight manner within the casing by means of the securing rings II, the diameter of said flexible member I0 being such as to leave an annular chamber between the recess 9 and the bore 8 of the casing 5.

The driving shaft I3 mounted in suitable bearings has secured thereto the arms I4 at each end of which is pivotally mounted the rollers I5 which are adapted to press the flexible mem-ber I0 into the recess 9 in the bore 8 of the casing 5, with a rolling contact.

That part of the flexible member I0 against which the rollers I5 make rolling contact may be protected from wear by means of the spring steel track I6 which ls bonded to the flexible member III.

.The annular chamber 9 is closed between the inlet and outlet ports 6, 1 by clamping the ilexible member I0 in a resilient or yielding manner in the recess I1 byy means of'` the resiliently mounted bar I8, transversely to the bore 8 oi the casing 5 which is held in position by the bolts 2| which are slidably mounted in the casing 5, with springs 22 positioned under the heads of said bolts 2| to normally retain the resiliently mounted bar I8 in the recess I1 as shown in Figure 3 so that when the delivery pressure exceeds a predetermined value, some of the fluid is by-passed to the inlet end of the annular chamber 9. lAt each side of' the transverse recess I'I the inlet and delivery ports 6, 1 communicate with the recess 9 at each side respectively of the resilient closure member,

In `operation the driving shaft `I3 is rotated, which rotates withV itthe arms I4, which movement forces the resilient member I0 into contact at two points with the recess 9, which when the rollers I5 pass the inlet port 6, sets up suction causing liquid to 'be drawn into the recess 9 until such time the second roller I5 at the opposite end of the arms passes the recess I1, when the operation is again repeated but the liquid then in front of the first roller I5 is forced out of the outlet port 1.

Referring to Figure 4 the position of the flexible member I0 when forced into the annular chamber 9 is indicated at I9 and shown fully distended at .20.

` I claim:

1. A fluid pump, comprising in combination a body part, an annular channel portion formed in said body part, inlet and outlet ports communicating with said annular channel portion, a resilient member disposed across said channel to form an annular chamber, having a resiliently mounted member to form an obstruction between the inlet and outlet ports, to permitl of the passage of liquid in the event of the pressure of fluid rising above a predetermined level, and a rotary member which is adapted to force the resilient member into the channel portion to cause a fluid to enter the chamber by suction at the inlet `port and to be expelled therefrom by virtue of the liquid being forced in front of the rolling member to the outlet port.

2. A fluid pump comprising in combination a body part, an annular channel formed in said body part, inlet and outlet ports communicating with said annular channel, a resilient member disposed across said channel to form an annular chamber, a resiliently mounted member in said chamber forming an obstruction between said ports, said obstruction being resiliently yieldable to permit of the passage of fluid between said ports in the event of the uid pressure rising above a predetermined level, a f'le'xible track member secured to said resilient member, and a rotary member disposed to contact said track member during rotation so as to force same and the resilient member into the channel portion to cause a fluid to enter the chamber by suction at the inlet port and to be expelled therefrom by virtue of the fluid being forced in front of the rotary member to the outlet port.

REGINALD CLARENCE FORD.

REFERENCES CITED The following references are of record in the flle of this patent:

UNITED STATES PATENTS Number Name Date 664,507 Singer Dec. 25, 1900 1,765,360 Baumann June 24, 1930 2,231,579 Huber Feb. l1, 1941 FOREIGN PATENTS Number Country Date 25,072 Switzerland Dec. 30, 1901 718,829 France Jan. 1932 

